Support cc_prebuilt_binary building with Bazel

Bp2build-enable cc_prebuilt_binary -> cc_prebuilt_binary

Bug: 241415823
Test: cc_prebuilt_binary_conversion_test.go
Change-Id: I007deef8d44f68993012f2114314d1cb52cfbb0e
diff --git a/cc/cc.go b/cc/cc.go
index d4eaa53..faa8571 100644
--- a/cc/cc.go
+++ b/cc/cc.go
@@ -3714,7 +3714,9 @@
 	prebuilt := c.IsPrebuilt()
 	switch c.typ() {
 	case binary:
-		if !prebuilt {
+		if prebuilt {
+			prebuiltBinaryBp2Build(ctx, c)
+		} else {
 			binaryBp2build(ctx, c)
 		}
 	case testBin: